/Engine/Source/Editor/UnrealEd/Public/Commandlets/AnalyzeReferencedContentStat.h
As well as the optional command line.
enum EIgnoreObjectFlags { IGNORE_StaticMesh = 0x00000001, IGNORE_StaticMeshComponent = 0x00000002, IGNORE_StaticMeshActor = 0x00000004, IGNORE_Texture = 0x00000008, IGNORE_Particle = 0x00000020, IGNORE_Anim = 0x00000040, IGNORE_LightingOptimization = 0x00000080, IGNORE_SoundCue = 0x00000100, IGNORE_Brush = 0x00000200, IGNORE_Level = 0x00000400, IGNORE_SkeletalMesh = 0x00000800, IGNORE_SkeletalMeshComponent = 0x00001000, IGNORE_Primitive = 0x00002000, IGNORE_SoundWave = 0x00004000, }